Developer Tools

Column breakpoints! This is still being worked on, and is currently disabled by default on Nightly under the devtools.debugger.features.column-breakpoints pref. When enabled, pressing Alt will let you choose columns within a line to break on.

JSMs now have the same interfaces exposed to them as DOM windows have (at least for WebIDL inclusions). However, we’ve not changed this in ESLint yet, for now update the globals list in tools/lint/eslint/eslint-plugin-mozilla/lib/environments/jsm.js